CN207547757U - A kind of broaching tool chip pocket - Google Patents

Abstract

The utility model discloses a kind of broaching tool chip pockets, including rake face, connecting arc, bottom of the chip pocket, changeover portion and rear knife face, the length of the rake face is less than 1mm, the relationship of the rake face and connecting arc is that mutually to cut be not tangent, passes through connecting arc transition between the rake face and rear knife face.

Description

A kind of broaching tool chip pocket

Technical field

The utility model is related to broaching tool technical field, specially a kind of broaching tool chip pocket.

Background technology

All the time, it is axial with high precision and high efficiency processing regulation along it as the inner peripheral surface for workpiece or surface The method of the slot of shape, there is known wire pulling methods.In the wire pulling method, the having with from front end side court of broaching tool will be referred to as The shaft-like tool of the gradual increased multiple cutting edges of end side and size is crimped on inner peripheral surface or the surface of workpiece backward, carries out drawing Or press-in, thus, it is possible to process slot as the profile of broaching tool by one-pass.

Therefore, broaching tool is the cutter that machining is carried out to workpiece, so as to when it is processed, generate chip.Also, by Be formed as multistage in its axial direction, therefore its chip is after firm cutting in the cutting edge of broaching tool, it is sometimes attached with the state of curling It in sword slot (chip pocket) between the cutting edges, heat when frictional force and chip can be increased.

Utility model content

The technical issues of the utility model solves is to overcome that the frictional force of the prior art is excessive, and chip has amount of heat Defect provides a kind of broaching tool chip pocket.The broaching tool chip pocket has the characteristics that the generation for reducing frictional force and chip heat.

To achieve the above object, the utility model provides following technical solution：A kind of broaching tool chip pocket, including rake face, Connecting arc, bottom of the chip pocket, changeover portion and rear knife face, the length of the rake face are less than 1mm, the rake face and connecting arc Relationship be that mutually to cut be not tangent, pass through connecting arc transition between the rake face and rear knife face.

Preferably, the angle of the rear knife face is slightly larger for 4 ° of more general 3 ° of values.

Compared with prior art, the beneficial effects of the utility model are：The utility model structure novel, reasonable design, it is preceding Knife face straightway is shorter, to avoid the time of contact and distance of chip and broaching tool, can reduce the generation of frictional force and chip heat；Before Knife face is mutually cut rather than tangent with connecting arc, can to avoid the time of contact and distance of chip and broaching tool, reduce frictional force and The generation of chip heat；Relief angle suitably increases, and can increase the sharpness of broaching tool cutting edge, reduces chip power and frictional force.

Description of the drawings

Fig. 1 is the utility model structure sectional view.

Figure label：Knife face behind 1 rake face, 2 connecting arcs, 3 bottom of the chip pocket, 4 changeover portions, 5.

Specific embodiment

The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work All other embodiments obtained shall fall within the protection scope of the present invention.

Referring to Fig. 1, the utility model provides a kind of technical solution：A kind of broaching tool chip pocket, including rake face 1, switching Circular arc 2, bottom of the chip pocket 3, changeover portion 4 and rear knife face 5, the length of the rake face 1 are less than 1mm, and the rake face 1 is justified with switching The relationship of arc 2 is that mutually to cut be not tangent, passes through 2 transition of connecting arc between the rake face 1 and rear knife face 5.Knife face 5 after described Angle for 4 ° of more general 3 ° of values it is slightly larger.

The utility model structure novel, reasonable design, 1 straightway of rake face is shorter, can connecing to avoid chip and broaching tool Time and distance are touched, reduces the generation of frictional force and chip heat；Rake face 1 is cut rather than tangent with 2 phase of connecting arc, can be kept away Exempt from time of contact and the distance of chip and broaching tool, reduce the generation of frictional force and chip heat；Relief angle suitably increases, and can increase broaching tool The sharpness of cutting edge reduces chip power and frictional force.

While there has been shown and described that the embodiment of the utility model, for the ordinary skill in the art, It is appreciated that can these embodiments be carried out with a variety of variations in the case of the principle and spirit for not departing from the utility model, repaiied Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.

Claims (2)

1. a kind of broaching tool chip pocket, including rake face (1), connecting arc (2), bottom of the chip pocket (3), changeover portion (4), rear knife face (5), it is characterised in that：The length of the rake face (1) is less than 1mm, and the rake face (1) and the relationship of connecting arc (2) are It is not tangent mutually to cut, and passes through connecting arc (2) transition between the rake face (1) and rear knife face (5).

2. a kind of broaching tool chip pocket according to claim 1, it is characterised in that：It is described after knife face (5) angle for 4 ° compared with General 3 ° of value is slightly larger.